This file points to 7 pairs of files of the form    "?bg*"
("?" is a single-character wildcard and "*" is a multiple-character wildcard.)

Crossing File	Backbone Overlay
1bg1_A	1bg1_A_sse
1bg2	1bg2_sse
1bg6	1bg6_sse
1bgc	1bgc_sse
1bgf	1bgf_sse
1bgk	1bgk_sse
1bgx_T	1bgx_T_sse